試卷：無年度 - 托福文法結構試題#10402
| 科目：TOEFL(Test of English as a Foreign Language)托福
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試卷名稱：無年度 - 托福文法結構試題#10402
科目：TOEFL(Test of English as a Foreign Language)托福
As an atom absorbs energy,_______ increases, and the atom is said to be
excited.
(A) its energy level
(B) as its energy level
(C) it is energy level
(D) the energy level of its
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